MB-9771 Perform view ops sorting in incremental index updater

Change-Id: Ib7a135d68504137c27535df49f402e5ddf5102b0
Reviewed-on: http://review.couchbase.org/31549
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>
Tested-by: Filipe David Borba Manana <fdmanana@gmail.com>